OpenVox G410E4 4 Port GSM/WCDMA PCI-E card with 4 WCDMA module Modular Design for GSM channels Up to 4 Simultaneous GSM Calls (Per PCI-E Slot) enables full flexibility to traditional telephony systems to go GSM network IMEI and PIN modification works with Asterisk, Elastix,PBX in a Flash, trixbox and IPPBX/IVR projects